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Research of Wireless Sensor Networks Unknown Nodes Localization Algorithm

Author: ShenYuJi
Tutor: WanFuCai
School: Shenyang University
Course: Control Theory and Control Engineering
Keywords: Wireless sensor networks DV-Hop DV-Distance Positioning error Three-dimensional positioning
CLC: TP212.9
Type: Master's thesis
Year: 2012
Downloads: 35
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Abstract


The wireless sensor network is a large number of sensor nodes through the the flight device or anthropogenic deployment shed in the area of ??interest , through self-organizing nodes form a wireless network quickly . Its purpose is to perceive by the collaboration between nodes , collecting and processing the information obtained within a specific area , and sends the observer . A wide range of prospects for the application of wireless sensor networks can be used in remote control and other aspects of the military and national defense , environmental monitoring , hazardous area . Positioning technology as the key technologies of wireless sensor networks --- directly determines the quality of the entire wireless sensor networks . Node positioning technology is currently the main direction of wireless sensor networks . In the practical application of the process , the wireless sensor network node in a three - dimensional environment , In this paper, two-dimensional DV-Hop algorithm and DV-Distance algorithm based on its application in three-dimensional space of unknown nodes in the positioning process and make improvements . The main work is as follows : ( 1 ) for the DV-Hop algorithm , by choosing 8 anchor nodes at the periphery of the simulation environment , calculate the average hop distance between the peripheral anchor node instead of the original algorithm anchor nodes involved in calculating the average distance per hop way to increase the average distance per hop reasonable . After the initial positioning of the unknown node , the position correction method of application design to reduce the unknown node location error . (2) DV - Distance algorithm using polyline distance instead of the straight - line distance to cause the problem of the inter-node distance estimation error is too large , by selecting boundary anchor node, and calculating the ratio of the actual distance and the estimated distance between them , and the ratio correction weights estimated as the effective distance between nodes , after the unknown nodes preliminary positioning , the position correction method of application design to reduce the unknown node location error . In this paper, MATLAB software to simulate the improved algorithm , applied directly in three-dimensional space , compared with the traditional algorithm , the improved algorithm has some advantages in reducing the positioning error , node positioning performance . Average jump from the DV-Hop algorithm selection and anchor nodes in the network within DV-Distance algorithm correction weights selection process does not participate in this process , to be able to save part of the network node energy consumption .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
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